B♭ Diminished Chord

Bbdim Level 5: The Abyss

B♭ Diminished (Bbdim) is built from the notes Bb, Db, E. Its intervals are Root — Minor 3rd — Diminished 5th. Tense, compressed, and unstable. The diminished triad sounds like it needs to go somewhere — it creates a feeling of suspense, anxiety, or unresolved drama.

Hear B♭ Diminished Chord

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Notes and intervals

Interval Semitones Note
Root 0 Bb
Minor 3rd 3 Db
Diminished 5th 6 E

What does b♭ diminished chord sound like?

Tense, compressed, and unstable. The diminished triad sounds like it needs to go somewhere — it creates a feeling of suspense, anxiety, or unresolved drama.

B♭ Diminished Chord in music

A chromatic passing chord that appears in jazz and classical harmony. Bb diminished creates tension that resolves upward to B or Cb.

How to recognise b♭ diminished chord by ear

Diminished sounds "squeezed." Both intervals are minor thirds, creating a tight, symmetrical structure. If a chord makes you feel uneasy or tense — like something is about to happen — that's diminished.

Practice identifying this chord in ChordFrog's Level 5: The Abyss .

Practice tip

Bb diminished creates tension that naturally resolves upward to B or Cb. Play Bb diminished → B major to hear this semitone resolution. The ascending movement from a diminished chord is less common than the descending resolution, making it a good ear-training challenge.

Frequently asked questions

What notes are in a B♭ Diminished chord?
B♭ Diminished (Bbdim) contains three notes: Bb, Db, E. The intervals are Root, Minor 3rd, Diminished 5th.
How do I recognise B♭ Diminished by ear?
Diminished sounds "squeezed." Both intervals are minor thirds, creating a tight, symmetrical structure. If a chord makes you feel uneasy or tense — like something is about to happen — that's diminished. Practice identifying B♭ Diminished in ChordFrog's Level 5 (The Abyss).
What level is B♭ Diminished in ChordFrog?
B♭ Diminished is introduced at Level 5: The Abyss. This is the final level, adding diminished and augmented triads for the complete chord vocabulary.

Other Bb chords

B♭ Major Chord B♭ Minor Chord B♭ Augmented Chord B♭ Sus2 Chord B♭ Sus4 Chord

All Diminished Chords chords

C Diminished Chord D♭ Diminished Chord D Diminished Chord E♭ Diminished Chord E Diminished Chord F Diminished Chord F♯ Diminished Chord G Diminished Chord A♭ Diminished Chord A Diminished Chord B Diminished Chord

Hear b♭ diminished chord for yourself

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